<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.bootcdn.net/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
</head>

<body>
  <button id="btn">提交</button>
  <script>
    $('#btn').click(function(){
      $.get('/userInfo',{
        userId: '001'
      },(data)=>{
        console.log(data);
      })
    })
    // $("#btn").click(function () {
    //   //jQuery的ajax二级封装
    //   $.get("/userinfo", {
    //     userId: "001"
    //   }, (data) => {
    //     console.log(data);
    //   })
    // })
  </script>
</body>

</html>